why can't watch videos any place but you tube?

i can watch videos only on you tube. this problem started about three weeks ago. i had up graded my browser but had no problem watching them on social web sites.. ie as tagged who told me i was the only one who uses mozilla fire fox.. when i try to watch them on social sites.. all i get is a blank white page no video no music.. nothing works fine with my other browsers if its my newest browser from fire fox and u cant fix the add ons and plug ins i will go back to an older browser.Stan

i can watch videos only on you tube. this problem started about three weeks ago. i had up graded my browser but had no problem watching them on social web sites.. ie as tagged who told me i was the only one who uses mozilla fire fox.. when i try to watch them on social sites.. all i get is a blank white page no video no music.. nothing works fine with my other browsers if its my newest browser from fire fox and u cant fix the add ons and plug ins i will go back to an older browser.Stan

Hi starsh1,
I'd try going to the plugin checker to see if everything is up to date:
http://www.mozilla.org/en-US/plugincheck/
You might also want to take a look at the [[Video or audio does not play]] Knowledge Base article. There is lots of good troubleshooting information in there.
Hopefully this helps!

Start Firefox in Troubleshoot Firefox issues using Safe Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).